Are you are talking of the salmon river in NY.
If so, I went there for the first time this year, winter fishing.
So I can only comment on the winter aspect.
It was less crowded then in the fall; wall to wall fishermen.
Go in the middle of the week, less people, everybody and his uncle arrive for the weekend.
It will be important for you to constantly check the water levels, the best fishing is at 550 cfs. The fishing is slow just after a water level change, it takes the fish about a day or two to reajust.
The norm is a 10 foot rod, 7 wt. very long leaders 12 to 14 feet.
4 to 6 pound flourocarbon.
!4 feet is length maximum length allowed by law, also it is important to mention that you are not allowed to have your weight ( split shots ) further then 4 feet from your fly.
It is chuck ,and duck fishing during winter, in the warmer months the steel move to take all kinds of flies.
Lead weight is not sold in NY, but you are allowed to use it on the river; take good sized split shots, because you will want to scrape the bottom; when I was there the guys told me if you are not bumping the bottom, and loosing flies, and shot, you are not fishing.
The flies are very small; 14, 16 black stone flies, or egg patterns in orange or chartreuse, blue seemed to be working well when I was there.
Tie them on strong hooks, not flimsy dry fly hooks.
I stayed at the super 8 hotel, decent lodgings for the price ( split it with a fishing buddy ), with a continental breakfast included.
There is a grocery store just beside it for supplies.
Go to the Orvis store, or Fat bettys tackle shop; two places that will show you how to set up your rig to fish. Extremely friendly, and kind people.
Talk to the people on the river, some are very nice, and help you out.
I met some cool guys, and exchanged flies.
OH YA !! If you are going in winter; insulated waders are a MUST!!! or you will freeze your toes off!! ( been there,and did that ). trust me on this one.
Cleats and a wading staff are also good to have if you are going to be moving arround on the river.
Here is a link for the weather, and water level forcast; www.whitakers.com
It is the orvis shop.
If you have any other questions, send me a private message, and I will send you my e-mail address.
Hope this helps,
chris